SteamyTea

It is easy to work 'into an angle" but not over one. So it would work fine with the top picture, but would fail with the bottom one. Cured GRP will always be under stress if bend it, so using pre-moulded 90° angle is out on the lower diagram. The ways around it are to radius the eternal angle, a 50mm radius should be OK. Alternatively, get some trip made up that is the right angle. A simple mould can be made on site by place a couple of strips of Contiboard over the angle and joining them together. Then laying up on the inside of that new mould, release and stick in place. Then the roof layup overlaps he edges. As for being wet, it won't sure properly. GRP layup has to be bone dry otherwise the resin will not cure properly. Even a small amount of moisture in the timber can cause problems. I have no experience of some of these newer resins, something I should look into. Polyurethanes have a good track record and have been in service many years. The main thing that plastics dislike is UV light, this is usually filtered out with a pigment, so should not be a problem.

I the 'olden days' when FiTs started, there where several thousand '4kW' systems installed with larger that 4kW module arrays. Even though the output was limited to 16A per phase, the overall yield was significantly greater, maybe up to a MWh/year. This was not too much of a problem electrically, especially if the local grid was robust, but it pissed off the people paying the FiTs as they had to pay out a lot more, maybe over £500/year, for 25 years, tax free. So the MCS/FiT/RHI people put a limit on the module array size, so a normal 4kW system could not have more than 4kW of modules on the DC side. What I have been unable to establish is if this is monitored/enforced by MCS only, or it is a DNO 'thing'. I do know that if a single MCS installation company fitted too much PV in an area, they were liable for the local grid/transformer upgrade, and in some instances, just a couple of rural installations could trigger an upgrade. The company I worked for got caught out on this one, a 6 kW install with full permission, then a week later a 4kW installation on the other house under usual installation rule, i.e. no prior approval. They were fighting with WP about the 20 installation in one street of about 50 houses when they went bankrupt. It would be nice to get a definitive answer to this.

I think this may be the problem. When most of the hole are plugged (usually in pairs), a greater back pressure can arise, that coupled to a lower fan speed (because the house is less leaky), may possible make the readings unstable. Of all the kit the forum has access to, a door blower would be one of the most useful. Trouble is, it would probably go missing.

I suppose the test equipment may start to get a bit unreliable at very low flow rates, but is will be good enough.

Yes. I am not really on about what is possible, rather if it is allowed. I just seem to remember that it is the system size i.e. the modules combined output that set the limit. Not sure where one would get this information from, maybe a called to the DNOs.

Is this one of those cases where you legally have to do something, then there is another law that says it is illegal to do it?

Is that the best place to site the ASHP, is there a solid wall below it?

Did we ever get a real solution to the difference between system size and inverter size?

I am up for teabagging someone, been a busy, hot and sweaty night. Ideal way to relax.

Here is a quick exercise to do. https://www.shorttutorials.com/heat-loss-due-to-radiation-and-convection/index.html As long as the radiators are not on a poorly insulated exterior wall, I would think they are not worth bothering with.

Will I be known as Tea

Was your father a metal worker? I know that Shropshire likes to think it was the birthplace of the industrial revolution, but it was really Cornwall. Why we make sandcastles.

You should have primed it with blood, sweat and tears first.

I had mine done about 13 years ago. You can ask to be 'set up' to be either short or long sighted. The default seems to be long sighted. Because I read a lot, I wish I had had short sighted lenses fitted, then you can just keep a pair of glasses in the car and not have to carry, or wear, glasses constantly.

For a laugh, make it airtight as you can, then pressure test it. That would be interesting research.

Rehearse on your own, then we will bring the hearse.

Can't answer that directly, but my timber framed house has some small air vents at first floor level. Not sure where they vent to from outside as not had to lift floor boards. I assume they are there to help with moisture control, but not thought about it too much. But now, my idea of externally insulation the place is going to play on my mind, as they vents will vet covered over.

I had to emulsion about 50 picture frames (traditional St. Ives frames). The first batch went well, then a new pot of paint, same make and type. A few weeks later, they all cracked up, and oddly, double sided tape would not stick to them at all. I now use a different make and type, and don't seem to have a problem. Did you say you mixed paint up somewhere else and were it is cracking, is that the first part you painted?

We should start a new topic on this, most of us are middle aged. Then we can get a better look at @ToughButterCup falling down a ladder. I am sure I read that we can all go around and film the next time he does it.

Not allowed any more. You serious, thought that was only countries that began with an S.

Static load as opposed to 1/2 mass X Velocity squared. Lots of proper marine stuff is galvanised, not sure what it is like if in sea for decades.

Something like this. https://www.screwfix.com/p/schlegel-aq21-window-door-seal-white-15m/2822P?tc=UT5&ds_kid=92700058173289226&ds_rl=1244072&gclid=EAIaIQobChMIjtqiw8H08AIVu2DmCh3IRADVEAQYAiABEgIes_D_BwE&gclsrc=aw.ds Or more like this. https://www.ebay.co.uk/itm/303812809301

That will be the Redruth to Hayle section then. All the surfers turn off at Newquay, so traffic only does 15 MPH, cause they are all stoned.

Can't, have had shiny acrylic put in to replace my old misty lenses. Could get your name Lasered on them I suppose. Be a bit weird asking, but no different than you getting Banksy tattooing your arse. I heard that men drawing on men's behind is a Bristol thing.

The flow rates are in the regs. https://www.gov.uk/government/publications/ventilation-approved-document-f Some HVAC info here. https://www.engineeringtoolbox.com/amp/hvac-systems-t_23.html